Valve mechanism for internal-combustion engines.



J. L. ARMITAGE. VALVE MECHANISM-FOR INTERNAL comausnow enemas. APPLICATION FILED APR. 12. I915- 1, 177,084, Patented Mar. 28, 1916.

2 SHEETS-SHEET llm [Mums J. L. ARMITAGE. VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR. 12. 1915.

1,177,084. Patehted Mai. 28, 1916.

THE COLUMBIA PLANOORAPH .Co., WASHINGTON, D. c

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VALVE MEoIrANIsi/r FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented Mar. 28, 1916.-

Application filedApIi]. 12, 1915. Serial No. 20,891.

To all whom it may concern Be it known that 1, JAMES L. AnMrrAoE,

fication.

\[y invention relates to improvements in valve mechanism for internal combustion engines, the ob ect of the invention being to provlde a valve mechanism which may bev readily connected to the casing of any ordinary internal combustionengine, andwhich embodies in its construction, an improved arrangement of valves with operating mechanism therefor, whereby the inlet and exhaust is properly timed and positively controlled.

A further object is to provide a mecha nism of the character stated which is of extremely simple construction, strong and durable in use. a

With these and other-objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings: Figure l is a view in side elevation partly in longitudinal section illustrating my improved mechanism in connection with an ordinary type of internal combustion engine. Fig. 2 is a fragmentary view in section on an enlarged scale on the line 22 of Fig. 1. Fig. 3 is a perspective view of the valve controlling cam. Fig. 4t is a fragmentary view in section on an enlarged scale on the line 4.-4L of Fig. 1, and Fig. is a fragmentary view in section on an enlarged scale on the line 5-5 of Fig. 1. a

1 represents the cylinder, and 2 the crank case of an ordinary internal combustion engine. 1

3 is the spark plug projecting into the end of cylinder 1; 4 and 5 are the couplings for the water pipes to supply the water jacket of the casing 1, and 6 is the drive shaft which projects through the crank case 2. The drive shaft 6 is connected by gears 7 and 8 with a time shaft 9, and on the time shaft 9 a sleeve 10 is secured by a set screw 11 for a purpose which will hereinafter appear.

To the side of cylinder 1, my improved valve casing 1.2 is secured by bolts 13. The casing 12 is made in two halves having projecting flanges 1-1 which are secured by bolts 15 and an opening 17 in the casing 12, registers with an opening 16 in the engine cylinder 1, so that the valve casing 12 has direct communication with the interior of the cylinder through the openings 16 and 17 The upper half of the casing 12 is formed with a valve seat 18 against which an inlet valve 19 normally engages to close communication between the inlet 20 and the interior of the valve casing.

21 represents an outlet or exhaust which is normally closed by a valve 22, the latter secured to a tubularvalve stem 23, which projectsthrough the lower end of the valve casing, and is guided in its movement by a bracket 24 secured to crank case 2.

The valve19 is secured to a stem 25 which extends through, and is guided by the tubular valve stem 23. A coiled spring 26 is located around the tubular valve stem 23, between the lower end of the valve casing 12 and a collar 27 on the tubular valve stem, so that the spring exerts a constant pressure on the valve 22, tending to hold it in closed position. On the lower end of tubular valve stem 23, an angle arm 28 is secured, and is provided at its free end with a roller 29. The extreme lower end of valve stem 25 is provided with a tongue 30, which projects through a slot 31 in tubular valve stem 23, and this tongue is secured to a bracket 32. The bracket 32 at its lower end is made with a guide pin 33, which slides in a bearing 34: secured to crank case 2. A coiled spring 35 is located on the pin 33 between the bearing 34, and the bracket 33, and exerts a constant pressure on the bracket and on the valve stem 25 to normally hold the valve 19 in closed position. An arm 36 is fixed to the bracket 32, and carries at its free end a roller 37 The sleeve 10 above referred to is made with two integral cams 38 and 39, located at an angle to each other and in different planes. The cam 38 is adapted to engage roller 29 to move tubular stem 23, and valve 22 upwardly,'while the cam 39 is adapted to engage roller 37 forcing the latter downwardly to draw the valve 19 from its seat.

It is, of course, to be understood that the arms 28 and 36 are so arranged as to position the rollers 29 and 37 out of alinement proper time for intake and exhaust, and the springs 26 and 33 return the valves to closed position and maintain them tightly against their seats.

My improved valve casing can be attached to any ordinary internal combustion engine, and various slight changes might be made in the general form and arrangement of parts described without departing from my invention, and hence I do not limit myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent is:

1. I11 a Valve mechanism for internal combustion engines, the combination with two valves, a tubular stem secured to one valve, a stem on the other valve projecting through the tubular stem, brackets secured to the ends of both stems, a stationary bracket, a guide pin on one of the first-mentioned brackets movable in the stationar bracket a spring around the guide pin exerting pressure to hold one of said valves in closed pcsltlon, a coiled spring around the tubular valve stem holding the othervalve in closed 1 position, and rotary cams engaging the firstmentioned brackets adapted to move the valves to open position, substantially as described.

2. In a valve'mechanism for internal combustion engines, the combination with two valves, a tubular stem secured to one valve, a stem on the other valve projecting through the tubular stem, brackets secured to the ends of both stems, a stationary bracket, a guide pin on one of the firstmentioned brackets movable in the stationary bracket, a spring around the guide pin exerting pressure to hold one of said valves in closed position, a coiled spring around the tubular valve stem holding the other valve in closed position, rollers 011 both of said first-mentioned brackets, and a pair of cams adapted to engage the said rollers and move the valves to open position, substantially as de scribed.

In testimony whereof I have signed my name to this specification-in the presence of two subscribing witnesses.

JAMES L. ARMITAGE.

Witnesses:

C. R. ZIEGLER, S. W. Fosrnn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

